frostfs-node/pkg/services/tree/cache.go
Evgenii Stratonikov b04f712773 [#1446] services/tree: Cache connections to the container nodes
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2022-07-21 15:08:24 +03:00

63 lines
1.3 KiB
Go

package tree
import (
"context"
"sync"
"github.com/hashicorp/golang-lru/simplelru"
"github.com/nspcc-dev/neofs-node/pkg/network"
"google.golang.org/grpc"
"google.golang.org/grpc/connectivity"
)
type clientCache struct {
sync.Mutex
simplelru.LRU
}
const defaultClientCacheSize = 10
func (c *clientCache) init() {
l, _ := simplelru.NewLRU(defaultClientCacheSize, func(key, value interface{}) {
_ = value.(*grpc.ClientConn).Close()
})
c.LRU = *l
}
func (c *clientCache) get(ctx context.Context, netmapAddr string) (TreeServiceClient, error) {
c.Lock()
ccInt, ok := c.LRU.Get(netmapAddr)
c.Unlock()
if ok {
cc := ccInt.(*grpc.ClientConn)
if s := cc.GetState(); s == connectivity.Idle || s == connectivity.Ready {
return NewTreeServiceClient(cc), nil
}
_ = cc.Close()
}
cc, err := dialTreeService(ctx, netmapAddr)
if err != nil {
return nil, err
}
c.Lock()
c.LRU.Add(netmapAddr, cc)
c.Unlock()
return NewTreeServiceClient(cc), nil
}
func dialTreeService(ctx context.Context, netmapAddr string) (*grpc.ClientConn, error) {
var netAddr network.Address
if err := netAddr.FromString(netmapAddr); err != nil {
return nil, err
}
cc, err := grpc.DialContext(ctx, netAddr.URIAddr(), grpc.WithInsecure())
if err != nil {
return nil, err
}
return cc, nil
}